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> Rails is stable

Rails certainly is mature, its APIs are not stable at all. With every version,even minor, there are annoying changes that often break 3rd party plugins. It shouldn't happen. That's why JEE has specs, as heavy as they get 3rd parties can always refer to them in order to write custom code. Rails is anything but stable. Hard to complete a single tutorial online without running into API issues.

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I got my first error right after `rails new myapp` and `rails server`. After some Googling I found out that apparently I had to install Node.js also, but the error message wasn't very clear. This was the official 'getting started' rails tutorial on the rubyonrails.org site [0].

[0] http://guides.rubyonrails.org/getting_started.html

Well, you need a javascript runtime, eg you could install nodejs, that's what the error says. I agree that it might be confusing as a rails beginner, but Rails uses it to convert CoffeeScript files and for minifying and merging all JS stuff into one file.

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